No answer at the door. Pausing for now Performed Tune upon system Found Airhandler to be extremely compacted with dust and dirt due to the homeowner tearing down walls and flooring in the house. Customer also wanted to know if we could lift unit or move unit to replace flooring under Airhandler, gave customer a price and they declined. AIRHANDLER DOES NOT HAVE ENOUGH RETURN AIR AIRHANDLER HAS THE WRONG FILTER IN FILTER BOX AND HAD THE FILTER DOOR OFF LETTING UNFILTERED AIR BYPASS THE FILTER. COMPRESSOR IS NOT RUNNING EFFICIENTLY AND DOES NOT SOUND GREAT. DUE TO THE COIL BEING HEAVILY COMPACTED AND ALMOST NO RETURN AIR THE REFRIGERANT LEVELS ARE SHOWING LOW AND LINESET IS FREEZING. COMPRESSOR MAY FAIL SOON RECOMMENDED NOT RUNNING THE SYSTEM TILL THE AIRHANDLER IS CLEANED AND ALL WORK IS DONE ON THE HOUSE Payment was being processed by the time tech left and said it failed so will be pausing for now.